What happens after death is anybody's guess, and nobody knows for sure.
There may be life after death, or there may be not; you may end up in hell like place for doing bad thing, or you may not, etc.

So there's a saying that goes like this - 'Do not put all your eggs in one basket'.
Don't put all your eggs in one basket, and this might well be the most valuable investment you have ever made in this life and beyond.